Machine for manufacturing bag packages



May 18, 1965 P. KUHNLE' MACHINE FOR MANUFACTURING BAG PACKAGES 3Sheets-Sheet 1 Filed Dec. 4, 1962 y 18, 1965 P- KUHNLE 3,183,798

MACHINE FOR MANUFACTURING BAG PACKAGES Filed Dec. 4, 1962 3 Sheets-Sheet2 FIG. 2

FIG; 4-

May 18, 1965 P. KUHNLE MACHINE FOR MANUFACTURING BAG PACKAGES 3Sheets-Sheet 3 Filed Dec. 4, 1962 FIG. 6

FIG. 3

United States Patent 2 Claims. for. 93 s This invention is concernedwith a machine for manufacturing bag packages, especially soft packagesof thin and flimsy packaging materials, with pouring spouts from blanksof packaging material which are individually fed to a folding mandreland folded around the latter in the production of the bag packages.

It is known to prefabricate the pouring spouts of metal and to applythem tothe packages, preferably to the narrow side walls of the latter,in such a way that they can be pivoted out of the confines of thepackages for discharge of the contents of the latter.

This method of applying the spouts to the packages is conventionallyused for packages of stiff paper or cardboard, but cannot be employed inthis simple form in the case of packages of soft and flimsy packagingmaterials such as thin foils and paper, since such packages are notstrong enough to hold the pouring spouts and, moreover, are very easilytorn. It has, therefore, already been proposed to first attach areinforcing patch of cardboard to the inside of one of the walls of thepackage before insertion of the spout into this wall.

An object of the present invention is to provide a machine for themanufacture of these reinforced packages which is of simple constructionand is reliable in operation.

A further object of the invention is to provide a machine which enablesthe reinforcing patches to be applied to the blanks of packagingmaterial, from which the bag packages are to be formed, as the blanksare being fed into the machine.

The invention will be fully understood from the following description ofa preferred embodiment of a machine according to this invention shown inthe accompanying diagrammatic drawings.

In these drawings:

FIGURE 1 is a side view of the machine partly cut away,

FIGURE 2 is a plan view of the machine shown in FIGURE 1,

FIGURE 3 is a view taken on the line IIIIII of FIGURE 1 showing part ofthe machine,

FIGURE 4 illustrates in side view a device for inserting the pouringspouts into the packages,

FIGURE 5 is a plan view, on a larger scale, of an anvil used in theinsertion of the spouts into the packages,

FIGURE 6 is a perspective view of a bag package, produced by the machineshown in FIGURES 1 to 5, with a pouring spout which is shown closed inthis figure, and

FIGURE 7 is a perspective view of the bag package shown in FIGURE 6 withthe pouring spout opened.

In the machine illustrated in the drawings, the bag packages 12 areformed on a machine of the kind described and illustrated in UnitedStates Patent No. 2,257,- 689 of T. Jungmayr. A machine of this kindcomprises an intermittently rotatable mandrel wheel 9 having mountedthereon a plurality of radially projecting folding mandrels 8 which,upon rotation of the wheel 9, are moved in turn to the individualworking stations of the machine. At the first working station I, a blankb of packaging material is'folded by means of a folding box 7 intoU-shape around the folding mandrel 8 concerned Patented May 18, 1965 atthis station and is then formed into a tube 1 by folding down of itsupstanding sides. A closure 20 is formed by folding in the end of thetube 2 projecting beyond the end of the mandrel 8 and this representsthe top of the final filled and closed bag package 12.

The individual blanks b are severed from a web 1 of packaging materialby means of a periodically operating severing device 10, 11. The web 1of packaging material is advanced intermittently, each time through thelength of one blank, from a supply reel 2 by means of a pair of drawrollers 5, 6, the leading end of the web being cut off by the severingdevice 10, 11 to form a bag blank each time the web has been advancedthrough one blank length.

Arranged along the path of feed of the web are two further pairs of drawrollers 40, 41 and 32, 33 which are driven continuously through chaindrives 42 and 43 respectively from a drive motor (not shown). The roller41 of the first pair of draw rollers 40, 41 has associated therewith anadhesive-applying unit 30 which applies adhesive to the web 1 ofpackaging material at the parts 34, 35 and 36 which, during theformation of the bag on the folding mandrel 8, form the longitudinalseam and the closure 20 of the package. Secured to a spindle 37 are adisc 44 and segments 45 and 46, all of which, upon rotation of thespindle 37, receive adhesive from an associated cylinder 47 which dipsinto adhesive contained in an adhesive container 38. Upon furtherrotation of the spindle 37, the adhesive is transferred from the disc 44and the segments 45, 46 to the web 1 of packaging material. To ensurethat the layers of adhesive on the web 1 at the parts 34, 35 and 36 areuniform, there is provided in the upper part of the adhesive container38 a stripper roller 48 which is in contact with the cylinder 47. Thespindle 37 carrying the segments 45, 46 and the disc 44, and thecylinder 47 are driven in correlation with the feed of the web 1 so thatthey perform one revolution per each blank length fed in. To this end,toothed wheels 50, 51 and 52 are respectively mounted on the roller 41,which is driven through the chain drive 42, on the spindle 37 and on thecylinder 47, these toothed wheels engaging with each other.

In order that the bag packages, which are made of soft and filmsypackaging materials such as thin foils or paper, may have a greaterrigidity at the parts thereof where the pouring spouts are to beprovided, a reinforcing patch 22 constituted by a piece of cardboard isadhered to each of the bag blanks b in the web 1 of packaging materialat the part where the spout is to be inserted.

For this purpose, there is secured on the spindle 37 a further segment53, which, when the web 1 is advanced, applies to each of the parts tobe reinforced a spot 31 of adhesive of an appropriate area for thereinforcing patch. A piece of cardboard constituting the patch 22 isthen placed on this spot 31 and pressed thereagainst by the pair of drawrollers 32, 33 as the web 1 is moved forwards.

The reinforcing patches 22 are severed by means of a rotary knife 23 anda stationary knife 24 from a web 21 of cardboard issuing from a supplyreel 27. This web 21 is advanced by means of a pair of draw rollers 25,26, the web 21 being fed through a length corresponding to onereinforcing patch 22 each time the web 1 packaging material is forwardedthrough one blank length, the patch 22 then being cut off from the web21 by the knife 23. The drive for the rotary knife 23 and the pair ofdraw rollers 25, 26 is derived from the spindle 37, being transmittedfrom this spindle through a chain drive 55 to the spindle 56 of therotary knife 23. Fixedly mounted on the spindle 56 is a toothed wheel 57which, to produce the drive of the draw rollers 25, 26, transmits rotarymovement through a toothed wheel 53 to a toothed wheel I by two pairs ofendlessly circulating conveyor belts 26,7

29 which bring them into face-to-face contact with the spot 31 ofadhesive on the web 1 of packaging material. The two conveyor belts ofthe pair 28 run around the roller 32 of the pair of draw rollers 32, 33,which is spring-urged against the Web 1 of packaging material, andaround a further roller 61, and the two conveyor belts of the pair 29run around two rollers 62 and 63. Two of the runs of these belts 23, 29are opposed to one another and extend at an inclination to the plane offeed of the web 1 of packaging material. The conveyor belts 28, 29 aredriven from the roller 32, which is connected through toothed wheels 64and 65 to the roller 33, at the same speed as the pair of draw rollers32, 33, so that, as the reinforcing patches 22 are fed on to the web 1of packaging material, there is no relative movement between the patchesand the Web. The two rollers 62 and 63 are connected together by toothedwheel 66 and 67.

At station II of the bag package-forming machine, a pouring spout 13 isinserted into each of the blanks b which have been provided withreinforcing patches 22 and then formed into a tube t as described above.

conventional apparatus 14 of the type such as is described in detail inUnited States Patent No, 2,300,099 of H. Brucker may be used for thispurpose. In this apparatus 14 which is driven from the main machinethrough a shaft 76 and bevel gears 71, 72, the spouts 13 are formed froma metal strip, are separated from the latter and then inserted frombelow into the alreadyreinforced part of the tube t on the foldingmandrel 8 concerned at station H (see FIGURE 4). An anvil 16 insertedinto each of the folding mandrels 8 serves as a guide and countersupport during insertion of the pouring spout. Each anvil 16 has formedtherein two wedgeshaped recesses 74 which guide the side wings of thespout 13 during insertion of the latter into the blank I), and a groove17 which, when the folding box 7 ascends, co-operates with a knife 18secured to the folding box 7 in such a way that a transverse incision 19is formed in the blank 12 at the point later to be occupied by anopening for the pouring spout (see FIGURES 6 and 7).

Finally, it is to be noted that the spot 31 of adhesive for sticking thereinforcing patch 22 on the web 1 of packaging material can consist of aplurality of dots or strips of adhesive.

I claim: I

1. A machine for manufacturing bag packages of thin flexible materialcomprising a periodically rotatable mandrel wheel including foldingmandrcls, first feeding means for feeding a continuous web of thin,flexible packaging material along a prescribed path towards a particularstation past which said folding -mandrels successively pass, meansadjacent the path of the web of material for periodically applyingadhesive material to specific portions of said web of packaging materialas said web is moving towards said station, said portions includingfirst portions enabling the closure of folded bag packages and secondportions for the adherence of reinforcing patches, first severing meansdisposed in the path of said continuous web of packaging material forperiodically severing said continuous web of packaging material to formpackaging blanks having regions with adhesive material, second feedingmeans for feeding a continuous web of reinforcing material, secondsevering means disposed in the path of feed of said continuous web ofreinforcing material for periodically severing said web of reinforcingmaterial to form successive reinforcing patches, means for synchronizingsaid first and second feeding means and said first and second severingmeans whereby one reinforcing patch is formed for each of said blanks,conveyor belt means extending between said second severing means and thepath of said packaging material and located between the mandrel wheeland the means for applying adhesive material to said web, said conveyorbelt means including two parallel runs of belts extending upwardly at anangle from the path of travel of the Web of material, means for drivingthe conveyor belt means such that said parallel runs of belts are drivenin the same direction and with a component extending in the direction ofadvancement of said web of packaging material so that the belts receivethe reinforcing patches one by one from said second severing means andconvey the patches in synchronism to the individual blanks now carryingadhesive material, means elastically urging one of the runs of the beltsinto contact with the first feeding means to cause the reinforcingpatches to be applied with force against the individual blanks in a Zonein which the blanks carry adhesive whereby each blank before reachingsaid folding mandrelhas a permanently afi'lxed reinforcing patch in aprescribed location, means associated with the folding mandrels forfolding thus rein forced blanks around said folding mandrels to formreinforced packages, and means cooperating with each folding mandrel asthe samepass the next successive station after rotation of the mandrelwheel for inserting a pouring spout into the reinforced package on thefolding mandrels in the region of the reinforcing patch.

2. A machine for manufacturing bag packages as claimed in claim 1, inwhich the second feeding means includes a pair of draw rollers and meansfor driving said rollers periodically in correlation with the feed ofthe web packaging material to the folding mandrels so that the web ofreinforcing material is advanced through a distance equal to the lengthof one reinforcing patch each time the web of packaging material isadvanced through a distance equal to the length of one blank.

References Cited by the Examiner UNITED STATES PATENTS 2,257,689 9/41Iungmayr 93-12 2,395,352 2/46 Staude et al. 9336 2,589,769 3/52 Bruckerl13l 2,778,546 1/57 Klausmann 222-531 2,966,832 1/61 Vergobbi 93-12FRANK. E. BAiLEY, Primary Examiner.

1. A MACHINE FOR MANUFACTURING BAG PACKAGES OF THIN FLEXIBLE MATERIALCOMPRISING A PERIODICALLY ROTATABLE MANDREL WHEEL INCLUDING FOLDINGMANDRALE, FIRST FEEDING MEANS FOR FEEDING A CONTINUOUS WEB OF THIN,FLEXIBLE PACKAGING MATERIAL ALONG A PRESCRIBED PATH TOWARDS A PARTICULARSTATION PAST WHICH SAID FOLDING MANDRELS SUCCESSIVELY PASS, MEANSADJACENT THE PATH OF THE WEB OF MATERIAL FOR PERIODICALLY APPLYINGADHESIVE MATERIAL TO SPECIFIC PORTIONS OF SAID WEB OF PACKAGING MATERIALAS SAID WEB IS MOVING TOWARDS SAID STATION, SAID PORTIONS INCLUDINGFIRST PORTIONS ENABLING THE CLOSURE OF FOLDED BAG PACKAGES AND SECONDPORTIONS FOR THE ADHERENCE OF REINFORCING PATCHES FIRST SERVING MEANSDISPOSED IN THE PATH OF SAID CONTINUOUS WEB OF PACKAGING MATERIAL FORPERIODICALLY SEVERING SAID CONTINUOUS WEB OF PACKING MATERIAL TO FORMPACKAGING BLANKS HAVING REGIONS WITH ADHESIVE MATERIAL, SECOND FEEDINGMEANS FOR FEEDING A CONTINUOUS WEB OF REINFORCING MATERIAL, SECONDSEVERING MEANS DISPOSED IN THE PATH OF FEED OF SAID CONTINUOUS WEB OFREINFORCING MATERIAL FOR PERIODICALLY SEVERING SAID WEB OF REINFORCINGMATERIAL TO FORM SUCCESSIVE REINFORCING PATCHES, MEANS FOR SYNCHRONIZINGSAID FIRST AND SECOND FEEDING MEANS AND SAID FIRST AND SECOND SEVERINGMEANS WHEREBY ONE REINFORCING PATCH IS FORMED FOR EACH OF SAID BLANKS,CONVEYOR BELT MEANS EXTENDING BETWEEN SAID SECOND SEVERING MEANS AND THEPATH OF SAID PACKAGING MATERIAL AND LOCATED BETWEEN THE MANDREL WHEELAND THE MEANS FOR APPLYING ADHESIVE MATERIAL TO SAID WEB, SAID CONVEYORBELT MEANS INCLUDING TWO PARALLEL RUNS OF BELTS EXTENDING UPWARDLY AT ANANGLE FROM THE PATH OF TRAVEL OF THE WEB OF MATERIAL, MEANS FOR DRIVINGTHE CONVEYOR BELT MEANS SUCH THAT SAID PARALLEL RUNS OF BELTS ARE DRIVENIN THE SAME DIRECTION AND WITH A COMPONENT EXTENDING IN THE DIRECTION OFADVANCEMENT OF SAID WEB OF PACKAGING MATERIAL SO THAT THE BELTS RECEIVETHE REINFORCING PATCHES ONE BY ONE FROM SAID SECOND SERVING MEANS ANDCONVEY THE PATCHES IN SYNCHRONISM TO THE INDIVIDUAL BLANKS NOW CARRYINGADHESIVE MATERIAL MEANS ELASTICALLY URGING ONE OF THE RUNS OF THE BELTSINTO CONTACT WITH THE FIRST FEEDING MEANS TO CAUSE THE REINFORCINGPATCHES TO BE APPLIED WITH FORCE AGAINST INDIVIDUAL BLANKS IN A ZONE INWHICH THE BLANKS CARRY ADHESIVE WHEREBY EACH BLANK BEFORE REACHING SAIDFOLDING MANDREL HAS A PERMANENTLY AFFIXED REINFORCING PATCH IN APRESCRIBED LOCATION, MEANS ASSOCIATED WITH THE FOLDING MANDREL FORFOLDING THUS REINFORCED BLANKS AROUND SAID FOLDING MANDRELS TO FORMREINFORCED PACKAGES, AND MEANS COOPERATING WITH EACH FOLDING MANDREL ASTHE SAME PASS THE NEXT SUCCESSIVE STATION AFTER ROTATION OF THE MANDRELWHEEL FOR INSERTING A POURING SPOUT INTO THE REINFORCED PACKAGE ON THEFOLDING MANDRELS IN THE REGION OF THE REINFORCING PATCH.